Microsoft investigates new Office zero-day flaw
Microsoft has confirmed Wednesday that it is looking into reports of a new Office zero-day flaw attackers could exploit to cause a denial of service or run malicious code on targeted Windows machines.
Antivirus giant Symantec released an email advisory on the flaw to customers of its DeepSight threat management system early afternoon US time on 23 May. A couple hours later, a Microsoft spokesperson confirmed the company is investigating the report. At issue is a buffer overflow flaw in Office 2000's UA ActiveX control. Because of the flaw, the application fails to properly check user-supplied data before copying it into a poorly-sized buffer, Symantec said.
